Optical receiver having compensation for Kerr effect phase noise
US7013089B1 · kind B1 · utility
7Cited by
10References
58Claims
0Family size
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Key dates
| Filing date | Apr 30, 2004 |
| Grant date | Mar 14, 2006 |
| Priority date | — |
| Expiry date | Jun 4, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/2543
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for reducing nonlinear phase noise that is induced in an optical transmission system by the interaction of optical amplifier noise and Kerr effect. The apparatus includes an intensity-scaled nonlinear phase noise compensator. The phase noise compensator reduces the nonlinear phase noise by rotating a phase estimate by a scaled signal strength estimate for the optical signal or by comparing a complex estimate of the optical signal to curved regions having scaled nonlinear decision boundaries. The scale factor is derived from the number of spans in the transmission system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.